The history of feudal emperors in China was ups and downs, with dozens of dynasties changing for more than 2,000 years. Among them, there is a special history. For more than 100 years after the demise of the Western Jin Dynasty, some scholars called this period Lu Chen in the Central Plains, while others called it the decline of the whole nation in China's 5,000-year history. There are few records in history books. So what happened during this period will have no sense of existence in history? "Five random flowers" refers to the Western Jin Dynasty, when the Central Plains was chaotic and the national strength was weak, nomadic people successively established several non-Han regimes, which formed a period of opposition with the Han people in the Central Plains. These five lakes mainly refer to the five tribes of Xiongnu, Xianbei, Anta, Qiang and Di. Since then, wars have been raging in the Central Plains, people are in dire straits, and major forces are fighting each other. The whole period was chaotic, and the total population of Han nationality fell to a record low due to the long-term war. In this short period of 130 years, the number of * * * in the Central Plains has decreased from 50 million to 7 million, which can be said to be the biggest crisis for a nation. At that time, the conference semifinals were brave and could fight well. After they rushed into the Central Plains, they not only burned and looted, but also took more than 10,000 Han girls back to be slaves before returning to the Li Dynasty. When Jie people invaded the Central Plains deeply, according to the living habits of nomadic people, they would not bring any food and grass, and they would take local girls wherever they hit, just like a group of hungry wolves who had just come out of the grassland. They did so many evils that people at that time avoided them. In their eyes, Han women were "sheep with two legs", and at that time they had developed to the point where they didn't treat the Central Plains people as human beings. It was not until Emperor Wendi and Emperor Yangdi established the Sui Dynasty that this chaotic and long-term chaotic war came to an end. Since then, due to the migration of population to the south and the shift of economic center of gravity to the south, the country has begun to stabilize and its development has gradually improved. In this 130 years, so many forces are fighting, so many wars can't be explained clearly in the history books, so there is no record in the history books.